Duration Converter
Convert a finite nonnegative duration between milliseconds, seconds, minutes, hours, days and fixed 365-day years.
Enter one decimal number without grouping, exponents or unit text. 1 minute = 60 seconds, 1 hour = 60 minutes, 1 day = 24 hours, 1 year = 365 days. Calendar months, leap years, dates, DST, clock and ISO duration parsing are excluded. Supported total: zero or 0.000001–9,007,199,254,740,991 milliseconds. Results use JavaScript floating-point arithmetic, rounded to 12 significant digits; they are not exact decimal accounting values.
| Unit | Value |
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A QUICK WALKTHROUGH
How to use this tool
- Enter the duration and its unit, then convert to all six units.
Scope and rules
Enter one decimal number without grouping, exponents or unit text. 1 minute = 60 seconds, 1 hour = 60 minutes, 1 day = 24 hours, 1 year = 365 days. Calendar months, leap years, dates, DST, clock and ISO duration parsing are excluded. Supported total: zero or 0.000001–9,007,199,254,740,991 milliseconds. Results use JavaScript floating-point arithmetic, rounded to 12 significant digits; they are not exact decimal accounting values.
GOOD TO KNOW
Common questions
Can I convert calendar months?
No. Months vary in length; this tool converts fixed elapsed units only.